This record provides a hydrogeological model for the island of Norderney (Germany). The dataset is associated with the data paper "Development of a three-dimensional hydrogeological model for the island of Norderney (Germany) using GemPy" published in Geoscience Data Journal (https://doi.org/10.1002/gdj3.208). Brief summary of the record contents figures.zip contains figures presented in the manuscript and corresponding Python scripts to create them. hydrgeological_model_3D_voxel.zip contains the GemPy model output data and parameter setting as well as discretization informations. hydrogeological_model_layer_raster.zip contains GeoTIFF files of the layer bases and thicknesses of the hydrogeological model. tables.zip contains csv-files for tables present in the supplementary information workflow.zip contains the entire processing workflow of the primary data and model development as well as creation. Required software Python (Version 3.9.13), R (Version 4.2.1), GemPy (Version 2.2.11), QGIS (Version 3.20.1). Changes to v1.2.1 Included folder 'tables/' Changes to v1.2.0 Correction of a typo in script for Figure 4 in folder 'figures/' Adaption of figure scripts to journal requirements regarding file types Changes to v1.1.0 New figures added in 'figures/'. Fig5, Fig7, and FigS1 (other figures renamed accordingly) new folder 'tables/' with added Tables TabS1 and TabS2 technical correction in README file (qL/T to qL/C) additional data congruence analysis, with additional script 's03d_check_hgsm_3d_congruence.py' and folder 'congruence_check/' in 'workflow/C_hgsm_nor_3d/'

Project funding was provided by the Federal Ministry of Education and Research of Germany (BMBF project WAKOS, funding reference number 01LR2003E).